I happened upon a situation where I wanted to apply a sequence of operations
to two instance variables without replicating the code.  Here's the trivial
equivalent case, written using eval:
--
class Foo
  def initialize
    @a = 1
    @b = 2
  end

  def inc_iv
    [:@a, :@b].each { |iv|
      eval "#{iv} += 1"
    }
  end
end
--

Could someone suggest a way to rewrite "inc_iv" without using eval, without
turning the guts of the each block into a method, and without flattening the
[:@a, :@b].each{} construct?

Thanks in advance!

 - jeff